多個動態選擇語句的內部連接

Question

你好，我需要通過應用inner join提取公共數據，這是在@sql變量的每個循環中獲得的。我想對@sql第一個循環獲得的結果應用inner join到第二個等。

例如我已經設置值：

1@3@4@kaal#maal#saal,2@5@6nn#mm 

上Attributes variable`so它運行兩次，則可以運行多次。每個獲得的結果都應該是內部連接的，最終結果應該是存儲其他表。

DECLARE @Attributes NVARCHAR(4000) 
     SET @Attributes = '1@3@4@kaal#maal#saal,2@5@6nn#mm' 
     DECLARE @ItemAttributes NVARCHAR(4000) 
     DECLARE @tblAttributes TABLE (
      RowNum INT identity(1, 1) 
      ,Attribute NVARCHAR(1000) 
      ) 

     INSERT INTO @tblAttributes (Attribute) 
     SELECT RTRIM(LTRIM(items)) 
     FROM split(@Attributes, ',') 

     DECLARE @Counter INT 
      ,@RowCount INT 
     DECLARE @sql NVARCHAR(2000) 

     SELECT @RowCount = count(RowNum) 
     FROM @tblAttributes 

     SET @Counter = 1 

     WHILE (
       @Counter <= @RowCount 
       OR @Counter = 1 
       ) 
     BEGIN 
      SELECT @ItemAttributes = Attribute 
      FROM @tblAttributes 
      WHERE RowNum = @Counter 

      DECLARE @tblAttr TABLE (
       RowNum INT identity(1, 1) 
       ,Attr NVARCHAR(1000) 
       ) 

      INSERT INTO @tblAttr (Attr) 
      SELECT RTRIM(LTRIM(items)) 
      FROM split(@ItemAttributes, '@') 

      DECLARE @AttributeID INT 
      DECLARE @InputTypeID INT 
      DECLARE @ValidationTypeID INT 
      DECLARE @AttributeValue NVARCHAR(4000) 

      SELECT @AttributeID = Attr 
      FROM @tblAttr 
      WHERE RowNum = 1 

      SELECT @InputTypeID = Attr 
      FROM @tblAttr 
      WHERE RowNum = 2 

      SELECT @ValidationTypeID = Attr 
      FROM @tblAttr 
      WHERE RowNum = 3 

      SELECT @AttributeValue = Attr 
      FROM @tblAttr 
      WHERE RowNum = 4 

      IF (@InputTypeID = 1) 
      BEGIN 
       IF (@ValidationTypeID = 3) 
       BEGIN 
        SELECT @sql = 'SELECT DISTINCT(ItemID) FROM dbo.Aspx_ItemAttributesValue_Decimal 
    WHERE AttributeValue IN(' + @AttributeValue + ') AND AttributeID =@AttributeID AND (IsDeleted=0 OR IsDeleted IS NULL)' 
       END 
       ELSE 
        IF (@ValidationTypeID = 5) 
        BEGIN 
         SELECT @sql = 'SELECT DISTINCT(ItemID) FROM dbo.Aspx_ItemAttributesValue_Int 
    WHERE AttributeValue IN(' + @AttributeValue + ') AND AttributeID =@AttributeID AND (IsDeleted=0 OR IsDeleted IS NULL)' 
        END 
        ELSE 
        BEGIN 
         SELECT @sql = 'SELECT DISTINCT(ItemID) FROM dbo.Aspx_ItemAttributesValue_Nvarchar 
    WHERE AttributeValue IN(' + @AttributeValue + ') AND AttributeID =@AttributeID AND (IsDeleted=0 OR IsDeleted IS NULL)' 
        END 
      END 

      IF (
        @InputTypeID = 5 
        OR @InputTypeID = 6 
        OR @InputTypeID = 9 
        OR @InputTypeID = 10 
        OR @InputTypeID = 11 
        OR @InputTypeID = 12 
        ) 
      BEGIN 
       SELECT @sql = 'SELECT DISTINCT(ItemID) FROM dbo.Aspx_ItemAttributesValue_Options 
    WHERE AttributeValue IN(' + @AttributeValue + ') AND AttributeID =@AttributeID AND (IsDeleted=0 OR IsDeleted IS NULL)' 
      END 

      IF (@InputTypeID = 7) 
      BEGIN 
       SELECT @sql = 'SELECT DISTINCT(ItemID) FROM dbo.Aspx_ItemAttributesValue_Decimal 
    WHERE AttributeValue IN(' + @AttributeValue + ') AND AttributeID =@AttributeID AND (IsDeleted=0 OR IsDeleted IS NULL)' 
      END 

      SET @Counter = @Counter + 1 
     END 

Answer 1

嘗試這一個 -

DECLARE 
     @Attributes NVARCHAR(2000) 
    , @SQL NVARCHAR(MAX) 

SELECT @Attributes = '1@3@4@kaal#maal#saal,2@5@6@nn#mm' 

DECLARE @tblAttributes TABLE 
(
     RowNum INT IDENTITY(1, 1) 
    , Attribute NVARCHAR(1000) 
) 

INSERT INTO @tblAttributes (Attribute) 
SELECT RTRIM(LTRIM(p.value('.', 'NVARCHAR(1000)'))) 
FROM (
    SELECT field = CAST('<s>' + REPLACE(@Attributes, ',', '</s><s>') + '</s>' AS XML) 
) d 
CROSS APPLY field.nodes('/s') t(p) 

DECLARE 
     @Counter INT 
    , @RowCount INT 

SELECT 
     @RowCount = COUNT(RowNum) 
    , @Counter = 1 
FROM @tblAttributes 

WHILE @Counter <= @RowCount OR @Counter = 1 BEGIN 

    DECLARE 
      @AttributeID INT 
     , @InputTypeID INT 
     , @ValidationTypeID INT 
     , @AttributeValue NVARCHAR(4000) 

    SELECT 
      @AttributeID = [1] 
     , @InputTypeID = [2] 
     , @ValidationTypeID = [3] 
     , @AttributeValue = [4] 
    FROM (
     SELECT 
       Attribute = RTRIM(LTRIM(p.value('.', 'NVARCHAR(4000)'))) 
      , rn = ROW_NUMBER() OVER (ORDER BY (SELECT 1)) 
     FROM (
      SELECT field = CAST('<s>' + REPLACE(Attribute, '@', '</s><s>') + '</s>' AS XML) 
      FROM @tblAttributes 
      WHERE RowNum = @Counter 
     ) d 
     CROSS APPLY field.nodes('/s') t(p) 
    ) r 
    PIVOT 
    (
     MAX(Attribute) 
     FOR rn IN ([1], [2], [3], [4]) 
    )p 

    SELECT @SQL = 
    CASE 
     WHEN @InputTypeID = 1 
      THEN 
      CASE 
       WHEN @ValidationTypeID = 3 
        THEN 'SELECT DISTINCT(ItemID) 
          FROM dbo.Aspx_ItemAttributesValue_Decimal 
          WHERE AttributeValue IN (' + @AttributeValue + ') 
           AND AttributeID =@AttributeID AND ISNULL(IsDeleted, 0) = 0' 
       WHEN @ValidationTypeID = 5 
        THEN 'SELECT DISTINCT(ItemID) 
          FROM dbo.Aspx_ItemAttributesValue_Int 
          WHERE AttributeValue IN (' + @AttributeValue + ') 
           AND AttributeID =@AttributeID AND ISNULL(IsDeleted, 0) = 0' 
       ELSE 'SELECT DISTINCT(ItemID) 
          FROM dbo.Aspx_ItemAttributesValue_Nvarchar 
          WHERE AttributeValue IN (' + @AttributeValue + ') 
           AND AttributeID =@AttributeID AND ISNULL(IsDeleted, 0) = 0' 
      END 
     WHEN @InputTypeID IN (5, 6, 9, 10, 11, 12) 
      THEN 'SELECT DISTINCT(ItemID) 
        FROM dbo.Aspx_ItemAttributesValue_Options 
        WHERE AttributeValue IN (' + @AttributeValue + ') 
         AND AttributeID = @AttributeID AND ISNULL(IsDeleted, 0) = 0' 
     WHEN @InputTypeID = 7 
      THEN 'SELECT DISTINCT(ItemID) 
        FROM dbo.Aspx_ItemAttributesValue_Decimal 
        WHERE AttributeValue IN (' + @AttributeValue + ') 
         AND AttributeID = @AttributeID AND ISNULL(IsDeleted, 0) = 0' 
    END 

    SET @Counter = @Counter + 1 

END 

SELECT @SQL